Killer Whale vs. Great White Shark

Last night I caught the end of a great documentary on Great White Sharks. I've watched many of these in the past, but this one was unique in that it featured live footage shot by Peter Pyle from Oct 1997, where he filmed a Killer Whale attacking and eating a Great White. The shark was hunting Sea Lions off the coast of Farallon Island. Until I watched this I never thought of Great White Sharks as being prey to anything. Here's the clip: